Put the old cookie sheet in the sink add a little water and add some baking soda and peroxide. Leave it soak for about 1 hour and the grime should wipe right off.
By coville123 from brockville, ontario
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Tried this twice & the gunk didn't budge.
Brillo pads and foaming bubble bathroom cleaner works great.
Thanks for the tip on how to clean those cookie sheets I surely didn't want to throw them away.
Thanks for the tip. I used a good cookie sheet to catch drippings and they burnt on. The baking soda and peroxide did the trick.
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